Stratospheric demand for storage risks capacity gap, says leading provider of hard drives. Mark Whitby, senior vice president of branded products at Seagate, says a storage capacity gap could emerge by 2020 when the world will be producing something like 44 zettabytes of data annually. The zettabyte era – how much data is that? To get just one zettabyte of data you would have to fill the storage capacity of 34,359,738,368 smartphones with 32GB (gigabytes) of memory each. So, 44 zettabytes requires…